版本：
文件：
- https://cdn.bootcdn.net/ajax/libs/constraintjs/0.9.7/cjs.js
- https://cdn.bootcdn.net/ajax/libs/constraintjs/0.9.7/cjs.min.js
- https://cdn.bootcdn.net/ajax/libs/constraintjs/0.9.7/cjs.min.js.map
Constraint library for JavaScript